CN108543541A - A kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst and its preparation method and application - Google Patents
A kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst and its preparation method and application Download PDFInfo
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- CN108543541A CN108543541A CN201810200730.4A CN201810200730A CN108543541A CN 108543541 A CN108543541 A CN 108543541A CN 201810200730 A CN201810200730 A CN 201810200730A CN 108543541 A CN108543541 A CN 108543541A
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- carbon nano
- nickel cobalt
- tube
- amino
- amino carbon
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- -1 amino carbon nano-tube Chemical compound 0.000 title claims abstract description 77
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 77
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 77
- 239000003054 catalyst Substances 0.000 title claims abstract description 74
- IGOJDKCIHXGPTI-UHFFFAOYSA-N [P].[Co].[Ni] Chemical compound [P].[Co].[Ni] IGOJDKCIHXGPTI-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000001257 hydrogen Substances 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 36
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 35
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000006185 dispersion Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 claims abstract description 10
- 150000001868 cobalt Chemical class 0.000 claims abstract description 9
- 150000002815 nickel Chemical class 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 8
- 235000019441 ethanol Nutrition 0.000 claims abstract description 8
- 239000012046 mixed solvent Substances 0.000 claims abstract description 5
- 238000006722 reduction reaction Methods 0.000 claims abstract description 4
- 238000010792 warming Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000005518 electrochemistry Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229910001379 sodium hypophosphite Inorganic materials 0.000 claims description 5
- 239000012265 solid product Substances 0.000 claims description 3
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 claims description 2
- 229940011182 cobalt acetate Drugs 0.000 claims description 2
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 claims description 2
- 229910001981 cobalt nitrate Inorganic materials 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 229940078494 nickel acetate Drugs 0.000 claims description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 239000002071 nanotube Substances 0.000 claims 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 abstract description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 238000001035 drying Methods 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 6
- 230000010287 polarization Effects 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 235000013495 cobalt Nutrition 0.000 description 4
- LOKCTEFSRHRXRJ-UHFFFAOYSA-I dipotassium trisodium dihydrogen phosphate hydrogen phosphate dichloride Chemical compound P(=O)(O)(O)[O-].[K+].P(=O)(O)([O-])[O-].[Na+].[Na+].[Cl-].[K+].[Cl-].[Na+] LOKCTEFSRHRXRJ-UHFFFAOYSA-I 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000002953 phosphate buffered saline Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000001117 sulphuric acid Substances 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical group Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- SPIFDSWFDKNERT-UHFFFAOYSA-N nickel;hydrate Chemical compound O.[Ni] SPIFDSWFDKNERT-UHFFFAOYSA-N 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 150000003460 sulfonic acids Chemical class 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- 229910003185 MoSx Inorganic materials 0.000 description 2
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002070 nanowire Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical class O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- HLJWMCUZPYEUDI-UHFFFAOYSA-L sodium hyponitrite Chemical compound [Na+].[Na+].[O-]N=N[O-] HLJWMCUZPYEUDI-UHFFFAOYSA-L 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/16—Reducing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B01J35/33—
-
- B01J35/393—
-
- B01J35/394—
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The invention belongs to electrocatalysis material field, a kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst and its preparation method and application is disclosed.Amino carbon nanotube is added to the in the mixed solvent of dimethylformamide and ethyl alcohol, ultrasonic disperse is uniform, and nickel salt and cobalt salt is then added, after 70~80 DEG C of 30~60min of stirring, ammonium hydroxide is added, continues 10~12h of stirring, then it is reacted at 150~180 DEG C, obtains presoma；Then presoma and hypophosphite are warming up to 300~400 DEG C of progress reduction reactions under an inert atmosphere, obtain nickel cobalt phosphorus/amino carbon nano-tube catalyst.The preparation method of the present invention is simple, the electronic structure at the phosphatization regulation activity center of the nanostructure of dispersion, the good electric conductivity of nitrogen carbon dope material and uniform, controllable is utilized in gained catalyst, overpotential of the catalyst in water electrolysis hydrogen production reaction is substantially reduced, electro-catalysis hydrogen production activity and stability are greatly improved.
Description
Technical field
The invention belongs to electrocatalysis material fields, and in particular to a kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst and its system
Preparation Method and application.
Background technology
With the development of human society, fossil fuel is seriously consumed, and the whole world is by face inside following century
Face the fossil fuel largely caused energy crisis of consumption.So it is our urgent problems to be solved to tap a new source of energy.Wherein hydrogen
Can have many advantages, such as that raw material rich reserves, pollution-free and high heating value are expected to solve energy crisis as substitute fossil fuels.
But it is that efficiency is low to prepare hydrogen problem encountered by splitting water, energy consumption is big.But the electric energy of electrolysis water can derive from
The regenerative resources such as water energy, wind energy are an approach for solving energy crisis from now on.It is well known that in electrolysis water liberation of hydrogen
In reaction, Pt systems metal is best catalyst, but its rarity possibility for limiting its large-scale application.Therefore it develops
Efficient stable and the liberation of hydrogen catalyst of low cost will be the hot spot studied now and difficult point.
The carbon nano tube surface of current research such as N doping implants unformed MoSxLayer (Nano Lett., 2014,
14,1228), it is applied to electrochemistry liberation of hydrogen, obtains down to the starting overpotential of 70mV and just obtained in the overpotential of 110mV
10mA cm-2Current density.This, which is attributed to, increases MoSxActive site and nitrogen-doped carbon nanometer pipe improve entirety
Electric conductivity.CuCoP/ nitrogen-doped carbons (Adv.Energy Mater., 2017,7,1601555) show remarkable performance, including
Low overpotential, small Tafel slopes, high current density.Ni12P5Energy conversion of the Nanoparticle Modified on Si nano wires
Efficiency ratio Pt Nanoparticle Modifieds will be big (ACS Nano, 2014,8,8121) on Si nano wires.These are the result shows that metal
Phosphide complex carbon material is promising and very promising generation catalyst in terms of liberation of hydrogen.
Invention content
Based on the above prior art, the primary purpose of the present invention is that providing a kind of nickel cobalt phosphorus/amino carbon nanometer pipe catalytic
The preparation method of agent.
Another object of the present invention is to provide a kind of nickel cobalt phosphorus/amino carbon nanotubes being prepared by the above method
Catalyst.The nanometer nickel-cobalt phosphorus particle disperseed in catalyst composition can fully expose its catalytic active site, amino carbon nanotube
The electric conductivity of catalyst can be effectively improved, accelerates charge transfer rate in electrochemical process, to improve activated centre nickel cobalt phosphorus
Latent active.The catalyst raw material derives from a wealth of sources, is of low cost, and shows under acid, neutral, alkaline condition high
Electro-catalysis hydrogen production activity and stability can replace using most wide platinum based catalyst at this stage.
It is still another object of the present invention to provide above-mentioned nickel cobalt phosphorus/amino carbon nano-tube catalysts in electrochemistry evolving hydrogen reaction
In application.
The object of the invention is achieved through the following technical solutions：
A kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst, including following preparation process：
(1) amino carbon nanotube is added to the in the mixed solvent of dimethylformamide and ethyl alcohol, ultrasonic disperse is uniform, obtains
To amino carbon nano tube dispersion liquid；
(2) nickel salt and cobalt salt are added in amino carbon nano tube dispersion liquid obtained by step (1), 70~80 DEG C of stirrings 30~
After 60min, ammonium hydroxide is added, continues 10~12h of stirring, then reacted at 150~180 DEG C, solid product is washed, dry, obtains
To presoma；
(3) presoma obtained by step (2) 300~400 DEG C are warming up under an inert atmosphere with hypophosphite to be gone back
Original reaction, obtains nickel cobalt phosphorus/amino carbon nano-tube catalyst.
Preferably, a concentration of 0.3~1mg/mL of amino carbon nano tube dispersion liquid described in step (1).
Preferably, the volume ratio (8~2) of in the mixed solvent dimethylformamide described in step (1) and ethyl alcohol:(2~
8)。
Preferably, the nickel salt described in step (2) is any one in nickel nitrate, nickel acetate.
Preferably, the cobalt salt described in step (2) is any one in cobalt nitrate, cobalt acetate.
Preferably, the ratio between the quality of amino carbon nanotube described in step (2) and the gross mass of nickel salt and cobalt salt are 1:
(2~10).
Preferably, the mass ratio of the quality of amino carbon nanotube and ammonium hydroxide described in step (2) is 15:(0.5~5).
Preferably, the control of the addition of nickel salt and cobalt salt described in step (2) is Ni in molar ratio:Co=(1~3):
(3~1).
Preferably, hypophosphite described in step (3) is sodium hypophosphite, the addition of sodium hypophosphite is forerunner
2~10 times of weight.
Preferably, reduction reaction described in step (3) carries out in tube furnace, hypophosphite is put into ceramic boat
In, and it is placed on the middle part of tube furnace, then presoma is put into the rear end of tube furnace, hypophosphite generates at a certain temperature
Reproducibility PH3Gas is fully reduced to presoma target phosphide.Hypophosphite is easily decomposes in this method, and preceding
The generation that body mixing nor affects on final product is driven, securely and reliably.The tail end of tube furnace connects exhaust gas processing device, first will pipe
Nitrogen is passed through in formula stove 30~50 minutes, to ensure that the oxygen of tube furnace is divided；Temperature control program, which is arranged, is：Heating rate is 2
~5 DEG C/min, 300~400 DEG C of 2~3h of maintenance are cooled down with 2~5 DEG C/min rates, obtain the nickel cobalt phosphorus/amino-carbon nanometer
Pipe catalyst.
A kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst, is prepared by the above method.The catalyst is received for amino-carbon
Mitron loads nickel cobalt phosphorus particle and constitutes.
Preferably, in the nickel cobalt phosphorus/amino carbon nano-tube catalyst nickel cobalt phosphorus mass percentage be 60%~
80%, the grain size of the nickel cobalt phosphorus particle is 5~10nm, and can be regulated and controled in proper range.
Above-mentioned nickel cobalt phosphorus/application of the amino carbon nano-tube catalyst in electrochemistry evolving hydrogen reaction.
The present invention preparation method and obtained product has the following advantages that and advantageous effect：
(1) present invention succeeds by hypophosphites reduction method using nickel metal salt, cobalt metal salt and sodium hypophosphite as raw material
It is prepared for double-metal phosphide, this method maximum temperature is 400 DEG C, and equipment requirement is simple, is not necessarily to external source reproducibility
Gas, safe operation are feasible.
(2) nanostructure of dispersion, nitrogen carbon dope material is utilized in present invention gained nickel cobalt phosphorus/amino carbon nano-tube catalyst
Good electric conductivity and uniform, controllable phosphatization regulation activity center electronic structure, substantially reduce the catalyst and be electrolysed
Overpotential in water hydrogen production reaction greatly improves electro-catalysis hydrogen production activity and stability.
(3) the preparation method prices of raw materials of the invention are cheap, and technical maturity is stable, easy to operate and low danger,
Controllability is strong, is suitable for large-scale production and industrialized production.
Description of the drawings
Fig. 1 is the SEM figures of gained nickel cobalt phosphorus/amino carbon nano-tube catalyst in the embodiment of the present invention 1.
Fig. 2 is the XRD diagram of gained nickel cobalt phosphorus/amino carbon nano-tube catalyst in the embodiment of the present invention 1.
Fig. 3 is gained nickel cobalt phosphorus/amino carbon nano-tube catalyst in the embodiment of the present invention 1 in 0.5M sulphuric acid electrolyte liquors
In polarization curve.
Fig. 4 is gained nickel cobalt phosphorus/amino carbon nano-tube catalyst in the embodiment of the present invention 1 in 1.0M phosphate buffered saline solutions
In polarization curve.
Fig. 5 is gained nickel cobalt phosphorus/amino carbon nano-tube catalyst in the embodiment of the present invention 1 in 1.0M potassium hydroxide electrolytes
In polarization curve.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1
(1) oxide/carbon nanometer tube, sodium hyponitrite and ethylenediamine (are added to dimethyl by 15mg amino carbon nanotube first
In acetamide, 120 DEG C of insulation reactions are heated to, solid product is washed, dry, obtains amino carbon nanotube, Diamond
Relat.Mater., 2014,46,1) it is put into volume ratio 8:In 2 dimethylformamide and alcohol mixed solution 50mL, ultrasound point
It dissipates 1 hour, obtains amino carbon nano tube dispersion liquid.
(2) the four water nickel acetates of 10mg are weighed, the four water cobalt acetates of 20mg are put into amino carbon nanotube point in step (1)
In dispersion liquid, after 80 DEG C are stirred 30 minutes, the ammonium hydroxide of 1mL is added, continues stirring 10 hours.Then complete soln is transferred to
In the polytetrafluoroethyllining lining of 100mL, and reaction kettle is tightened, is put into constant temperature oven, 150 DEG C of holding 3h.Wait for the reaction time
It arrives, takes out pyroreaction kettle, it is naturally cold really to room temperature.Sediment in liner is taken out, deionized water centrifuge washing 3 times,
60 DEG C of drying in drying box are put into, presoma is obtained.
(3) 0.1g sodium hypophosphites are weighed to be put into 30*60mm ceramic boats, and are placed on the middle part of tube furnace, then will step
Suddenly the presoma that (2) obtain is put into the rear end of tube furnace.The tail end of tube furnace connects exhaust gas processing device.It first will be in tube furnace
Nitrogen is passed through 30 minutes, to ensure that the oxygen of tube furnace is divided.Temperature control program, which is arranged, is：Heating rate be 2 DEG C/min, 350
DEG C maintain 2h, rate of temperature fall is also 2 DEG C/min.Finally obtain nickel cobalt phosphorus/amino carbon nano-tube catalyst.
Fig. 1 is the SEM figures of nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment.Pass through as we know from the figure
The composite material obtained after above procedure is the structure that nickel cobalt phosphorus nano particle is supported in amino carbon nanotube, and between particle
It keeps good dispersibility and size distribution is uniform, size is 5~10nm.
Fig. 2 is the XRD diagram of nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment.By each diffraction maximum in figure
Comparison PDF cards obtain being NiP and Co2P compounds, it is the diffraction maximum of carbon nanotube to have apparent carbon peak.
The electrochemical property test of nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment：
It is accurate weigh 10mg nickel cobalts phosphorus/amino carbon nano-tube catalyst and be dispersed in include deionized water, absolute ethyl alcohol,
5% perfluorinated sulfonic acid solution (v/v/v=1:1:0.28) in 1mL mixed solutions, ultrasonic 30 minutes to form uniform suspension.
Then above-mentioned hanging drop is taken to be coated onto on the glass-carbon electrode that diameter 5mm is, working electrode can be prepared in natural drying, prepare
The electrochemistry hydrogen manufacturing performance test of obtained working electrode is all made of three-electrode system.It is graphite rod to electrode, reference electrode is
Saturated calomel electrode.
Fig. 3 is nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment in 0.5M sulphuric acid electrolyte liquors
Polarization curve.High hydrogen evolution activity is shown in acid condition, and current density is 10mA cm-2Under conditions of mistake
Potential is only 52mV.The elctro-catalyst shows high liberation of hydrogen stability under acidic environment simultaneously, is recycled by 1000 times
Afterwards, do not observe that apparent activity declines.
Fig. 4 is nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment in 1.0M phosphate buffered saline solutions
Polarization curve.Higher hydrogen evolution activity is shown in neutral conditions, and current density is 10mA cm-2Under conditions of mistake
Potential is only 133mV.The elctro-catalyst shows higher liberation of hydrogen stability under neutral environment simultaneously, is recycled by 1000 times
Afterwards, do not observe that apparent activity declines.
Fig. 5 is nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment in 1.0M potassium hydroxide electrolytes
Polarization curve.Preferable hydrogen evolution activity is shown under alkaline condition, and current density is 10mA cm-2Under conditions of mistake
Potential is only 100mV.The elctro-catalyst shows high liberation of hydrogen stability in alkalinity simultaneously, after 1000 cycles, not
Observe that apparent activity declines.
Embodiment 2
(1) 50mg amino carbon nanotubes are put into volume ratio 8 first:2 dimethylformamide and alcohol mixed solution
In 50mL, ultrasonic disperse 1 hour obtains amino carbon nano tube dispersion liquid.
(2) the four water nickel acetates of 100mg are weighed, the four water cobalt acetates of 100mg are put into amino carbon nanotube in step (1)
In dispersion liquid, after 80 DEG C are stirred 30 minutes, the ammonium hydroxide of 10mL is added, continues stirring 10 hours.Then complete soln is transferred to
In the polytetrafluoroethyllining lining of 100mL, and reaction kettle is tightened, is put into constant temperature oven, 180 DEG C of holding 5h.Wait for the reaction time
It arrives, takes out pyroreaction kettle, it is naturally cold really to room temperature.Sediment in liner is taken out, deionized water centrifuge washing 5 times,
80 DEG C of drying in drying box are put into, presoma is obtained.
(3) 0.5g sodium hypophosphites are weighed to be put into 30*60mm ceramic boats, and are placed on the middle part of tube furnace, then will step
Suddenly the presoma that (2) obtain is put into the rear end of tube furnace.The tail end of tube furnace connects exhaust gas processing device.It first will be in tube furnace
Nitrogen is passed through 30 minutes, to ensure that the oxygen of tube furnace is divided.Temperature control program, which is arranged, is：Heating rate be 5 DEG C/min, 400
DEG C maintain 2h, rate of temperature fall is also 5 DEG C/min.Finally obtain nickel cobalt phosphorus/amino carbon nano-tube catalyst.
The electrochemical property test of nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment：
It is accurate weigh 10mg nickel cobalts phosphorus/amino carbon nano-tube catalyst and be dispersed in include deionized water, absolute ethyl alcohol,
5% perfluorinated sulfonic acid solution (v/v/v=1:1:0.28) in 1mL mixed solutions, ultrasonic 30 minutes to form uniform suspension.
Then above-mentioned hanging drop is taken to be coated onto on the glass-carbon electrode that diameter 5mm is, working electrode can be prepared in natural drying, prepare
The electrochemistry hydrogen manufacturing performance test of obtained working electrode is all made of three-electrode system.It is graphite rod to electrode, reference electrode is
Saturated calomel electrode.
Nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment is shown in 0.5M sulphuric acid electrolyte liquors
High hydrogen evolution activity, current density are 10mA cm-2Under conditions of overpotential be only 53mV.The elctro-catalyst is in acid simultaneously
Property environment under show high liberation of hydrogen stability, after 1000 cycles, do not observe that apparent activity declines.This reality
It applies the phosphorus of the nickel cobalt obtained by example/amino carbon nano-tube catalyst and shows higher liberation of hydrogen work in 1.0M phosphate buffered saline solutions
Property, current density is 10mA cm-2Under conditions of overpotential be only 135mV.The elctro-catalyst shows under neutral environment simultaneously
Go out higher liberation of hydrogen stability, after 1000 cycles, does not observe that apparent activity declines.Obtained by the present embodiment
Nickel cobalt phosphorus/amino carbon nano-tube catalyst shows preferable hydrogen evolution activity, current density in 1.0M potassium hydroxide electrolytes
For 10mA cm-2Under conditions of overpotential be only 101mV.The elctro-catalyst shows high liberation of hydrogen stability in alkalinity simultaneously,
After 1000 cycles, do not observe that apparent activity declines.
Embodiment 3
(1) 30mg amino carbon nanotubes are put into volume ratio 8 first:2 dimethylformamide and alcohol mixed solution
In 50mL, ultrasonic disperse 1 hour obtains amino carbon nano tube dispersion liquid.
(2) the four water nickel acetates of 100mg are weighed, the four water cobalt acetates of 40mg are put into amino carbon nanotube point in step (1)
In dispersion liquid, after 80 DEG C are stirred 30 minutes, the ammonium hydroxide of 4mL is added, continues stirring 12 hours.Then complete soln is transferred to
In the polytetrafluoroethyllining lining of 100mL, and reaction kettle is tightened, is put into constant temperature oven, 160 DEG C of holding 3h.Wait for the reaction time
It arrives, takes out pyroreaction kettle, it is naturally cold really to room temperature.Sediment in liner is taken out, deionized water centrifuge washing 5 times,
80 DEG C of drying in drying box are put into, presoma is obtained.
(3) 0.3g sodium hypophosphites are weighed to be put into 30*60mm ceramic boats, and are placed on the middle part of tube furnace, then will step
Suddenly the presoma that (2) obtain is put into the rear end of tube furnace.The tail end of tube furnace connects exhaust gas processing device.It first will be in tube furnace
Nitrogen is passed through 30 minutes, to ensure that the oxygen of tube furnace is divided.Temperature control program, which is arranged, is：Heating rate be 3 DEG C/min, 300
DEG C maintain 2h, rate of temperature fall is also 3 DEG C/min.Finally obtain nickel cobalt phosphorus/amino carbon nano-tube catalyst.
The electrochemical property test of nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment：
It is accurate weigh 10mg nickel cobalts phosphorus/amino carbon nano-tube catalyst electro-catalysis catalyst for preparing hydrogen and be dispersed in include from
Sub- water, absolute ethyl alcohol, 5% perfluorinated sulfonic acid solution (v/v/v=1:1:0.28) in 1mL mixed solutions, ultrasonic 30 minutes with shape
At uniform suspension.Then above-mentioned hanging drop is taken to be coated onto on the glass-carbon electrode that diameter 5mm is, natural drying can be prepared into
To working electrode, the electrochemistry hydrogen manufacturing performance test for the working electrode being prepared is all made of three-electrode system.It is stone to electrode
Inker, reference electrode are saturated calomel electrode.
Nickel cobalt phosphorus/amino carbon nano-tube catalyst obtained by the present embodiment is shown in 0.5M sulphuric acid electrolyte liquors
High hydrogen evolution activity, current density are 10mA cm-2Under conditions of overpotential be only 54mV.The elctro-catalyst is in acid simultaneously
Property environment under show high liberation of hydrogen stability, after 1000 cycles, do not observe that apparent activity declines.This reality
It applies the phosphorus of the nickel cobalt obtained by example/amino carbon nano-tube catalyst and shows higher liberation of hydrogen work in 1.0M phosphate buffered saline solutions
Property, current density is 10mA cm-2Under conditions of overpotential be only 137mV.The elctro-catalyst shows under neutral environment simultaneously
Go out higher liberation of hydrogen stability, after 1000 cycles, does not observe that apparent activity declines.Obtained by the present embodiment
Nickel cobalt phosphorus/amino carbon nano-tube catalyst shows preferable hydrogen evolution activity, current density in 1.0M potassium hydroxide electrolytes
For 10mA cm-2Under conditions of overpotential be only 99.7mV.The elctro-catalyst shows high liberation of hydrogen stabilization in alkalinity simultaneously
Property, after 1000 cycles, do not observe that apparent activity declines.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst, it is characterised in that including following preparation process：
(1) amino carbon nanotube is added to the in the mixed solvent of dimethylformamide and ethyl alcohol, ultrasonic disperse is uniform, obtains ammonia
Base carbon nanotube dispersion liquid；
(2) nickel salt and cobalt salt are added in amino carbon nano tube dispersion liquid obtained by step (1), 70~80 DEG C of stirrings 30~
After 60min, ammonium hydroxide is added, continues 10~12h of stirring, then reacted at 150~180 DEG C, solid product is washed, dry, obtains
To presoma；
(3) presoma obtained by step (2) 300~400 DEG C are warming up under an inert atmosphere with hypophosphite restore instead
It answers, obtains nickel cobalt phosphorus/amino carbon nano-tube catalyst.
2. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
The volume ratio (8~2) of in the mixed solvent dimethylformamide described in step (1) and ethyl alcohol:(2~8)；The amino-carbon nanometer
A concentration of 0.3~1mg/mL of pipe dispersion liquid.
3. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
Nickel salt described in step (2) is any one in nickel nitrate, nickel acetate；The cobalt salt is in cobalt nitrate, cobalt acetate
Any one.
4. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
The ratio between the quality of amino carbon nanotube described in step (2) and the gross mass of nickel salt and cobalt salt are 1:(2~10)；The amino-carbon
The quality of nanotube and the mass ratio of ammonium hydroxide are 15:(0.5~5).
5. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
The control of the addition of nickel salt and cobalt salt described in step (2) is Ni in molar ratio:Co=(1~3):(3~1).
6. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
Hypophosphite described in step (3) is sodium hypophosphite, and the addition of sodium hypophosphite is 2~10 times of forerunner's weight.
7. a kind of preparation method of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 1, it is characterised in that：
Reduction reaction carries out in tube furnace described in step (3), hypophosphite is put into ceramic boat, and be placed on tube furnace
Middle part, then presoma is put into the rear end of tube furnace, the reproducibility PH that hypophosphite generates at a certain temperature3Gas is before
It drives body and is fully reduced to target phosphide；The tail end of tube furnace connects exhaust gas processing device, and nitrogen will be first passed through in tube furnace
30~50 minutes, to ensure that the oxygen of tube furnace is divided；Temperature control program, which is arranged, is：Heating rate be 2~5 DEG C/min, 300~
400 DEG C of 2~3h of maintenance, are cooled down with 2~5 DEG C/min rates, obtain the nickel cobalt phosphorus/amino carbon nano-tube catalyst.
8. a kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst, it is characterised in that：Pass through claim 1~7 any one of them side
Method is prepared, and the catalyst is that the carbon nanotube loaded nickel cobalt phosphorus particle of amino is constituted.
9. a kind of nickel cobalt phosphorus/amino carbon nano-tube catalyst according to claim 8, it is characterised in that：The nickel cobalt phosphorus/
The mass percentage of nickel cobalt phosphorus is 60%~80% in amino carbon nano-tube catalyst, the grain size of nickel cobalt phosphorus particle is 5~
10nm。
10. nickel cobalt phosphorus/application of the amino carbon nano-tube catalyst in electrochemistry evolving hydrogen reaction described in claim 8 or 9.
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